FRP (Fiber Reinforce Plastic) rod type combined tie piece and sandwich thermal insulation wallboard

Abstract

The FRP rod type combined tie piece comprises a five-direction communicating structural piece, a reinforcing steel bar bolt and a fiber reinforced composite material rib, the five-direction communicating structural piece comprises two horizontal connecting pipes which are perpendicular to each other, and a vertical connecting pipe is arranged at the communicating point of the two horizontal connecting pipes; the two ends of the fiber reinforced composite material rib are inserted into the vertical connecting pipes of the two five-way communicating structural parts respectively and are fixedly connected with the five-way communicating structural parts in an inserted mode through the reinforcing steel bar plug pins, and the combined tying part is formed. In practical application, leaf plate steel bars of the sandwich thermal insulation wallboard directly penetrate into the two horizontal connecting pipes which are vertically arranged to form a binding-free three-dimensional steel bar net rack, and after concrete is poured, the pulling pieces and the concrete form a composite stress body through the occlusion effect of aggregate. In the building construction process, the construction efficiency is improved, the anchoring problem of the tie piece is solved, the overall mechanical property of the sandwich heat preservation wallboard is guaranteed, and the FRP tie piece has important significance for overcoming the defects of a common commercial FRP tie piece.

Description

An FRP rod-type composite tie rod and sandwich insulation wall panel Technical Field

[0001] This utility model belongs to the field of prefabricated building technology and relates to an FRP rod-type combined tie member and a sandwich insulation wall panel. Background Technology

[0002] Traditional external insulation carries the risk of delamination and detachment, while internal insulation occupies indoor space. Therefore, sandwich insulation has become the mainstream choice. Currently, precast sandwich insulated external wall panels adopt a composite structure design, mainly composed of inner and outer leaf concrete wall panels, high-efficiency insulation materials, connecting tie rods, structural embedded parts, and connection nodes. This structural design not only effectively solves the problem of traditional walls occupying indoor usable space, but also features short construction cycles, convenient installation, and excellent thermal insulation performance, fully reflecting the development trend of modern building industrialization.

[0003] In current engineering practice, FRP tie rods have become the preferred solution for ultra-thick insulation layers of 150mm or more due to their combination of a low thermal conductivity of 0.43W / (m·K) and a compressive strength of 350MPa. Recent research shows that cross-shaped GFRP tie rods with optimized cross-section design can increase the assembly accuracy of sandwich wall panels to 75%, providing an important reference for the development of next-generation prefabricated building connection technologies. However, currently available commercial tie rods for various structural types also have the following problems.

[0004] 1. It has a low elastic modulus (about 1 / 10 that of steel) and is prone to sudden fracture under stress.

[0005] 2. The weak connection and anchoring capabilities prevent the provision of high integration and shear bearing capacity, leading to interlayer shear failure at the interface between the inner and outer leaf wall panels and the insulation board.

[0006] 3. The anchoring design of the inner and outer leaf wall panels is too complex, and the construction process is also quite cumbersome.

[0007] Therefore, there is a need in this field for a tie-fitting component that is simple to construct while ensuring that the connected prefabricated sandwich insulated wall panels have good mechanical properties. Summary of the Invention

[0008] To solve the above-mentioned technical problems, the purpose of this utility model is to provide an FRP rod-type combined tie member and a sandwich insulation wall panel.

[0009] This utility model discloses an FRP rod-type combined tie member, comprising: a five-way connecting structural member, a steel bar pin, and a fiber-reinforced composite material bar. The five-way connecting structural member includes two horizontally connected pipes arranged perpendicularly to each other, and a vertical connecting pipe is provided at the connection point of the two horizontally connected pipes. The two ends of the fiber-reinforced composite material bar are respectively inserted into the vertical connecting pipes of the two five-way connecting structural members and fixed to the five-way connecting structural members by inserting the steel bar pin.

[0010] Furthermore, both ends of the fiber-reinforced composite material bar are provided with first through holes for inserting steel bar pins, and the vertical connecting pipe of the five-way connecting structure is provided with second through holes for inserting steel bar pins. The five-way connecting structure and the fiber-reinforced composite material bar are connected by steel bar pins to form a tie member as a whole.

[0011] Furthermore, the wall thickness of the horizontal and vertical connecting pipes is 4mm-6mm, and the inner diameter of the horizontal and vertical connecting pipes is 20mm.

[0012] Furthermore, the five-way interconnected structural component is integrally molded from glass fiber.

[0013] Furthermore, the fiber-reinforced composite material ribs are made of glass fiber or basalt fiber.

[0014] This utility model discloses a sandwich insulated wall panel, comprising: an inner concrete leaf plate, an inner leaf plate steel mesh, an outer concrete leaf plate, an outer leaf plate steel mesh, an insulation board, and multiple tie members. The tie members are the aforementioned FRP rod-type combined tie members. The FRP rod-type combined tie members penetrate the insulation board and are connected to the steel bars constituting the inner leaf plate steel mesh and the outer leaf plate steel mesh through five-way connecting structural members at both ends, thereby forming an integral wall panel with the insulation board, the inner concrete leaf plate, and the outer concrete leaf plate.

[0015] Furthermore, both the inner and outer leaf plate steel meshes are composed of multiple longitudinal and transverse steel bars arranged perpendicularly to each other. A five-way connecting structural member is placed at the intersection of the longitudinal and transverse steel bars. The longitudinal and transverse steel bars pass through two horizontal connecting pipes respectively, achieving connection between the longitudinal and transverse steel bars. Compared to traditional tie rods, this utility model's FRP rod-type composite tie rod achieves a performance breakthrough through modular design: the main body is assembled with a five-way connecting structural member (five-way connector) and FRP bars, achieving rapid connection through Φ8 steel bar pins.

[0016] Its core advantages are reflected in:

[0017] 1. Improved anchoring performance: The five-way connector is embedded in the concrete layer at both ends, resulting in a larger concrete contact area and improved anchoring force.

[0018] 2. Shear strength optimization: The stress concentration areas are completely cast within the concrete cover to improve the overall structure's shear resistance.

[0019] 3. Convenience of construction: The prefabrication and assembly process solves the problem of connecting the tie parts and the steel mesh of the outer leaf plate during the construction of the sandwich insulation wall panel, thus improving the efficiency of on-site production. Attached Figure Description

[0020] Figure 1 is a three-dimensional structural schematic diagram of an FRP rod-type combined tie member of this utility model;

[0021] Figure 2 is a three-dimensional structural diagram of the five-way interconnected structural component of this utility model;

[0022] Figure 3 is a partial cross-sectional view of the sandwich insulated wall panel of this utility model;

[0023] Figure 4 is a schematic diagram of the five-way interconnected structural component of this utility model and the fixing of the steel mesh;

[0024] Among them: 1-five-way connecting structural component, 11-horizontal connecting pipe, 12-vertical connecting pipe, 2-reinforcing bar pin, 3-fiber reinforced composite material bar, 4-inner leaf plate steel mesh, 5-formwork, 6-concrete inner leaf plate, 7-insulation board, 8-outer leaf plate steel mesh, 9-concrete outer leaf plate. Detailed Implementation

[0025] As shown in Figures 1 and 2, this utility model discloses an FRP rod-type composite tie member, comprising: a five-way connecting structural member 1, a steel bar pin 2, and a fiber-reinforced composite material bar 3. The five-way connecting structural member 1 includes two horizontally connected pipes 11 arranged perpendicularly to each other, and a vertical connecting pipe 12 is provided at the connection point of the two horizontally connected pipes 11. The fiber-reinforced composite material bar 3 is inserted into the vertical connecting pipes 12 of the two five-way connecting structural members at both ends, and is fixed to the five-way connecting structural member 1 by the steel bar pin 2, forming a complete composite tie member.

[0026] In specific implementation, both ends of the fiber-reinforced composite material rib 3 are provided with first through holes for inserting steel bar pins 2. The opposite side walls of the vertical connecting pipe 12 of the five-way connecting structure are respectively provided with second through holes for inserting steel bar pins 2. After the fiber-reinforced composite material rib 3 is inserted into the vertical connecting pipe 12, the first through holes and the second through holes are aligned, and then the five-way connecting structure 1 and the fiber-reinforced composite material rib 3 are connected to form a tie member as a whole by inserting steel bar pins 2 into the through holes.

[0027] In specific implementation, the five-way connecting structure 1 is integrally molded from glass fiber. The wall thickness of the horizontal connecting pipe 11 and the vertical connecting pipe 12 is 4mm-6mm, the inner diameter of the horizontal connecting pipe 11 and the vertical connecting pipe 12 is 20mm, and the length of the horizontal connecting pipe 11 and the vertical connecting pipe 12 is 50mm.

[0028] In specific implementation, the fiber-reinforced composite material rib 3 is made of glass fiber or basalt fiber. The diameter of the fiber-reinforced composite material rib 3 is slightly smaller than the inner diameter of the vertical connecting pipe 12, and its length is 110 mm. The length of the fiber-reinforced composite material rib 3 can be changed to adapt to sandwich insulation wall panels of different thicknesses.

[0029] As shown in Figure 3, this utility model discloses a sandwich insulated wall panel comprising an inner concrete leaf plate 6, an inner leaf plate reinforcing mesh 4, an outer concrete leaf plate 9, an outer leaf plate reinforcing mesh 8, an insulation board 7, and multiple tie members. The tie members are the aforementioned FRP rod-type composite tie members. These FRP rod-type composite tie members penetrate the insulation board 7 and are connected to the reinforcing bars constituting the inner leaf plate reinforcing mesh 4 and the outer leaf plate reinforcing mesh 8 via five-way connecting structural members 1 at both ends, thereby forming an integral wall panel with the insulation board 7, the inner concrete leaf plate 6, and the outer concrete leaf plate 9.

[0030] As shown in Figure 4, both the inner leaf plate reinforcement mesh 4 and the outer leaf plate reinforcement mesh 8 are composed of multiple longitudinal and transverse reinforcement bars arranged perpendicularly to each other. The five-way connecting structural member 1 is set at the intersection of the longitudinal and transverse reinforcement bars, and the longitudinal and transverse reinforcement bars pass through two horizontal connecting pipes 11 respectively to realize the connection between the longitudinal and transverse reinforcement bars.

[0031] In practice, multiple FRP rod-type composite tie members are arranged within the sandwich insulation wall panel, positioned at the intersections of longitudinal and transverse reinforcing bars. The longitudinal and transverse reinforcing bars are then threaded into the corresponding FRP rod-type composite tie members, ultimately forming a mesh structure. The inner and outer leaf plate reinforcing meshes are connected to the FRP rod-type composite tie members to form a unified whole, eliminating the need for binding the reinforcing mesh. The specific arrangement, quantity, and spacing can be increased or decreased according to design requirements.

[0032] The manufacturing process of a sandwich insulated wall panel is as follows: First, place the five-way interconnected structural component 1 according to the design coordinates. Then, fix the inner leaf plate steel mesh to the five-way interconnected structural component 1, and use steel bar pins 2 to connect the fiber-reinforced composite material reinforcement 3 to the five-way interconnected structural component 1. After all connection nodes have passed inspection, hoist the inner leaf plate steel mesh 4 into the precast template and pour concrete to create the inner leaf plate 6. Cover the surface of the concrete inner leaf plate 6 with the insulation board 7. Pre-drill holes at corresponding locations on the insulation board 7 for the fiber-reinforced composite material reinforcement 3 to pass through. Fabricate the outer leaf plate steel mesh 8 according to the specifications and arrangement of the inner leaf plate steel mesh 4. Use steel bar pins 2 to connect the other end of the fiber-reinforced composite material reinforcement 3 to the five-way interconnected structural component 1 on the outer leaf plate steel mesh 8. Pour LC30 lightweight concrete in layers to the designed thickness of the outer leaf plate. After each layer is vibrated and compacted, continue pouring the next layer.

[0033] In practice, the inner concrete leaf plate 6 is 60mm thick. By completely encasing the five-way interconnected structural member 1 in concrete to form an integral structure, the problem of weak connection points is solved, and the concrete's bonding effect increases the anchorage contact area. This structural measure effectively disperses stress concentration, avoiding the risk of early brittle failure and anchorage failure. The insulation board 7 is 80mm thick.

[0034] This utility model relates to a sandwich insulated wall panel. During construction, it is essential to ensure that the FRP rod-type composite tie members are anchored at the intersections of the reinforcing steel frame, and then the entire load-bearing system is formed through concrete pouring. This process achieves integrated prefabrication of structure, insulation, and decoration, eliminating the need for on-site rebar tying. The planar layout density, longitudinal spacing, and other parameters of the FRP rod-type composite tie members should be determined through structural calculations based on the wall panel specifications, shear capacity, and thermal performance requirements. The entire construction process requires no welding, effectively avoiding cold bridging effects. The reinforcing steel pins 2, fiber-reinforced composite reinforcement 3, and leaf plates share the load, resulting in good overall structural performance and significant engineering application value.

[0035] The above description is only a preferred embodiment of the present utility model and is not intended to limit the concept of the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An FRP rod-type composite tie member, characterized in that, include: The five-way connecting structural member, the steel bar pin, and the fiber-reinforced composite material bar are provided. The five-way connecting structural member includes two horizontal connecting pipes arranged perpendicularly to each other, and a vertical connecting pipe is provided at the connection point of the two horizontal connecting pipes. The two ends of the fiber-reinforced composite material bar are respectively inserted into the vertical connecting pipes of the two five-way connecting structural members and fixed to the five-way connecting structural member by steel bar pins.

2. The FRP rod-type combined tie member according to claim 1, characterized in that, Both ends of the fiber-reinforced composite material bar are provided with a first through hole for inserting a rebar pin, and the vertical connecting pipe of the five-way connecting structure is provided with a second through hole for inserting a rebar pin. The five-way connecting structure and the fiber-reinforced composite material bar are connected by the rebar pin to form a tie member as a whole.

3. The FRP rod-type combined tie member according to claim 1, characterized in that, The wall thickness of the horizontal and vertical connecting pipes is 4mm-6mm, and the inner diameter of the horizontal and vertical connecting pipes is 20mm.

4. The FRP rod-type combined tie member according to claim 1, characterized in that, The five-way interconnected structural component is integrally molded from glass fiber.

5. The FRP rod type combined draw-in member according to claim 1, characterized by The fiber-reinforced composite material ribs are made of glass fiber or basalt fiber.

6. A sandwich thermal wall panel comprising: The invention comprises an inner concrete leaf slab, an inner leaf slab steel mesh, an outer concrete leaf slab, an outer leaf slab steel mesh, an insulation board, and multiple tie members, characterized in that the tie members are FRP rod-type composite tie members as described in any one of claims 1-5; the FRP rod-type composite tie members penetrate the insulation board and are connected to the steel bars constituting the inner leaf slab steel mesh and the outer leaf slab steel mesh through five-way connecting structural members at both ends, thereby forming an integral wall panel with the insulation board, the inner concrete leaf slab, and the outer concrete leaf slab.

7. The sandwich insulated wall panel according to claim 6, characterized in that, Both the inner and outer leaf plate steel meshes are composed of multiple longitudinal and transverse steel bars arranged perpendicularly to each other. The five-way connecting structural members are set at the intersection of the longitudinal and transverse steel bars. The longitudinal and transverse steel bars pass through two horizontal connecting pipes respectively to achieve the connection between the longitudinal and transverse steel bars.

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